fix #4356 : place sw.js to assets/sw.js (#4357)

.gitignore

@@ -21,7 +21,6 @@ public/system
 public/assets
 public/packs
 public/packs-test
-public/sw.js
 .env
 .env.production
 node_modules/

config/webpack/production.js

@@ -48,7 +48,7 @@ module.exports = merge(sharedConfig, {
       ServiceWorker: {
         entry: path.join(__dirname, '../../app/javascript/mastodon/service_worker/entry.js'),
         cacheName: 'mastodon',
-        output: '../sw.js',
+        output: '../assets/sw.js',
         publicPath: '/sw.js',
         minify: true,
       },

public/sw.js

+assets/sw.js
\ No newline at end of file